Lumpsum Calculator

Estimate one-time investment growth and reverse-calculate CAGR from your start and end values.

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How to use this calculator
  1. 1

    Choose analysis mode

    Use Future Value mode for projection, or Reverse CAGR mode to find annualized return from start and end values.

  2. 2

    Enter amount and years

    Provide one-time investment amount and holding period, or start and end values for CAGR.

  3. 3

    Compare outcomes

    Use multiple return assumptions and compare with SIP, FD, or PPF for portfolio allocation.

Rs
%
yrs

Lumpsum projection

Invested amountRs 5,00,000
Estimated gainsRs 10,52,924

Next step

Compound interest calculatorSIP calculatorFD calculatorPPF calculator

Investment growth over time

ValueInvested
Yr 0Yr 2Yr 4Yr 6Yr 8Yr 10

Value after Yr 10: ₹15.5L (invested: ₹5.0L)

Lumpsum uses compounding estimate. CAGR formula: ((Ending / Starting)^(1 / years) - 1) x 100.

Quick answer

Lumpsum growth depends heavily on holding period. Even modest annual return assumptions can produce strong corpus growth over long tenures.

A lumpsum calculator estimates the future value of a one-time investment. It is useful when you have surplus funds from bonus, inheritance, business profit, or asset sale and want to project potential growth over time.

What is this calculator?

This calculator supports two workflows: (1) future value projection from amount, return, and tenure; (2) reverse CAGR calculation from start value, end value, and years. It helps investors compare products using a common annualized return language.

Formula

Future value (compounded):
FV = P x (1 + r/n)^(n x t)

CAGR:
CAGR = ((Ending Value / Starting Value)^(1/t) - 1) x 100

Where P = initial amount, r = annual return, n = compounding periods per year, t = years.

Example

Example 1: One-time Rs 5,00,000 invested for 10 years at 12% annual return. The maturity estimate helps you compare whether this aligns with your goal timeline. Example 2: If Rs 4,00,000 grows to Rs 8,00,000 in 7 years, reverse CAGR mode gives annualized growth rate for better comparison with other options.

Another example

If your target is Rs 20 lakh in 12 years, start with expected return assumptions and back-check whether current one-time amount is sufficient. If not, combine lumpsum with SIP contributions.

Scenario snapshots

Bonus deployment planning

Model how annual bonus can grow if invested instead of parked in low-yield accounts.

Portfolio review

Use reverse CAGR to evaluate whether historical returns justify continued allocation.

Goal-gap analysis

Estimate if one-time corpus is enough for education, house down payment, or retirement milestone.

Decision guide

Choose this when

  • ✓You have one-time capital and want future value projection.
  • ✓You want annualized return (CAGR) from start and end values.
  • ✓You need to compare one-time investing against SIP or fixed-income options.

Pick another route when

  • •You need month-by-month cash-flow modeling with periodic additions.
  • •You require post-tax and post-inflation adjusted net return only.
  • •You need guaranteed maturity values for products with variable rates.

Common mistakes to avoid

  • !Using unrealistic return assumptions based on short bull-market periods.
  • !Comparing absolute returns across unequal tenures instead of CAGR.
  • !Ignoring liquidity needs and investing all surplus into one asset class.

Assumptions and disclaimers

Updated context: 2026

  • •Return is assumed constant over tenure for projection simplicity.
  • •No tax, exit load, brokerage, or expense ratio adjustments are applied.
  • •Compounding frequency is simplified for estimate-level planning.

In practice (India)

Search intent around lumpsum calculator India usually combines two needs: projecting growth and understanding whether past performance translates into annualized return. Reverse CAGR mode addresses the second need directly and avoids misleading point-to-point comparisons.

For better decisions, benchmark one-time investment against alternative deployment: debt allocation for near-term goals, equity allocation for long-term goals, and tax-efficient products for specific objectives.

Benefits

  • ✓Projects maturity value for one-time investments quickly.
  • ✓Reverse CAGR mode helps normalize past performance comparisons.
  • ✓Useful for bonus, inheritance, and corpus deployment decisions.
  • ✓Supports scenario planning before committing funds.

Related calculators and guides

Frequently Asked Questions

What is CAGR and why does it matter?
CAGR is compounded annual growth rate. It converts total growth over multiple years into an annualized figure, making comparisons fairer.
Is lumpsum better than SIP?
It depends on timing, risk tolerance, and cash flow. Lumpsum can work well for long horizons and disciplined allocation; SIP can reduce timing risk.
Can I use this for mutual funds?
Yes, for projection and scenario planning. Actual returns vary and are not guaranteed.
Should I use pre-tax or post-tax return?
Prefer post-tax assumptions for realistic planning, especially when comparing debt products.
Does this include inflation impact?
No. For real-return planning, reduce expected return by expected inflation.

Lumpsum and CAGR outputs are planning estimates and should be validated against product-specific costs, taxes, and risk.

How we calculate

Estimates use the formula shown above. Rules and rates are checked against official India sources where applicable (Income Tax Act, RBI/NSC circulars, GST law). Last reviewed for 2026.

  • Return is assumed constant over tenure for projection simplicity.
  • No tax, exit load, brokerage, or expense ratio adjustments are applied.
  • Compounding frequency is simplified for estimate-level planning.

Full methodology & sources